/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-05 Marco Riccardi - initial implementation
 *  2011-03-25 Marco Riccardi - implementation of visitor pattern
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.IElement;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLAttribute;
import org.mizartools.utility.xml.XMLElement;

public class ConstrCounts implements IElement {


    public static final String NAME = "ConstrCounts";

    private INode parentNode;
    private String name = null;

    private LinkedList<ConstrCount> constrCountList = new LinkedList<ConstrCount>();


    private ConstrCounts(INode parentNode){
        this.parentNode = parentNode;
    }

    public INode getParentNode() {
        return parentNode;
    }

    public static ConstrCounts newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        ConstrCounts constrCounts = new ConstrCounts(parentNode);
        XMLElement xmlElement = xmlElementList.poll();
        if (!xmlElement.getName().equals(NAME)){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a " + NAME, xmlElementList);
        }
        for (XMLAttribute xmlAttribute : xmlElement.getXMLAttributeList()){
            if (xmlAttribute.getName().equals("name")){
                if (constrCounts.name == null){
                    constrCounts.name = xmlAttribute.getValue();
                } else {
                    throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
                } 
            } else 
                throw new ElementParseException(ElementParseException.NOT_VALID_ATTRIBUTE_ELEMENT, "XMLElement has not a valid attribute " + xmlAttribute.getName(), xmlElementList);
        }

        if (!xmlElement.isEmpty()){
            while (true){
                xmlElement = xmlElementList.peek();
                if (xmlElement == null){
                    throw new ElementParseException(ElementParseException.UNEXPECTED_END_OF_FILE, "Unexpected end of XMLElement list");
                }
                if (xmlElement.getName().equals(NAME) && xmlElement.isEndElement()){
                    xmlElement = xmlElementList.poll();
                    break;
                }
                if (xmlElement.getName().equals("ConstrCount")){
                    constrCounts.constrCountList.add(ConstrCount.newInstance(constrCounts, xmlElementList));
                } else 
                    throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "The XMLElement " + xmlElement.getName() + " is not valid in " + NAME, xmlElementList);
            }
        }

        return constrCounts;
    }

    public LinkedList<XMLElement> getXMLElementList() {
        LinkedList<XMLElement> xmlElementList = new LinkedList<XMLElement>();
        XMLElement xmlElement = new XMLElement(NAME);
        if (this.name != null) {
            XMLAttribute xmlAttribute = new XMLAttribute("name", this.name);
            xmlElement.getXMLAttributeList().add(xmlAttribute);
        }
        boolean isEmpty = !(!constrCountList.isEmpty());
        xmlElement.setEmpty(isEmpty);
        xmlElementList.add(xmlElement);
        for (ConstrCount constrCount : this.constrCountList){
            xmlElementList.addAll(constrCount.getXMLElementList());
        }
        if (!isEmpty) { 
            xmlElement = new XMLElement(NAME);
            xmlElement.setEndElement(true);
            xmlElementList.add(xmlElement);
        }
        return xmlElementList;
    }

    public String getName(){
        return name;
    }


    public LinkedList<ConstrCount> getConstrCountList(){
        return constrCountList;
    }

	@Override
	public void accept(Visitor visitor) {
		if (visitor.visit(this)) {
			for(ConstrCount constrCount: this.constrCountList) {
				constrCount.accept(visitor);
			}
		}
		visitor.endVisit(this);
	}

	@Override
	public String toString(){
		ToStringVisitor toStringVisitor = new ToStringVisitor();
		this.accept(toStringVisitor);
		return toStringVisitor.toString();
	}

}
